I'm just wondering why no one talks about multipool.us

It seems like they've just dropped off the face off the earth despite still having ~500Th on the network.

I'm currently running 2 antminer S1s, each on their own  worker with BAN.  I plan on added 2 more S3s.  Right now I'm using the slower HR port.  Should I just have everything on 1 worker?  Is there a difference?

Like the title says.  I don't pay for hydro so I'm not worried about my consumption at all.  I want to mine out of my apartment so noise and hashrate are my only 2 concerns.  What would be the best I could buy that is quiet and under $1k